ИСТИНА

The morphology of gold was studied by SEM method. It was established that morphology of gold in association with arsenopyrite, quartz, sulphosalts and secondary minerals is different. In the Zarmitan ores gold with quartz have isometric form and smooth surface with rare growth steps. Gold with arsenopyrite from the Zarmitan ores has interstitial and wire-like forms and traces of dissolution and leaching on there surfaces. Gold is unhomogeneus, with growth embryos on their surface. It has microblock structure. Gold from the Zarmitan ores in assosiation with sulphosalts has complicated form, friable cellular sculpture of surface and inclusions of other minerals. In the Mardzhanbulak ores gold were investigated from primary and oxidized deposits. The gold from primary ores has a lumplucing form, aggregate structure and oolitic texture, which may formed by recrystallization of colloidal solution. The gold in association with secondary minerals was characterized by interstitial forms. On its surface were seen a numerous cube-octahedron embrois of new genegation of gold and cavities and cracks whose origin was probably associated with the oxidation processes. Gold from upper horizons of oxidizing zone may be characterized as relict (residual). The gold has a cementation structure. Its small grains are included in complex polimineral ochres.